ENH: step mesh operation adjustment

1.Put commctrl.h into pch precompilation(OCCT conflicts)

2.Replace input wxWidgets to support loss focus verification(STUDIO-8101)

3.Optimize slider interaction and trigger mesh when push up slider(STUDIO-8099)

4.Optimize step loading method, separate import of step and mesh

5.Fix dialog cancel button logic;

6.mesh tasks into sub-threads to prevent blocking the UI;

JIRA: STUDIO-8101 STUDIO-8099
Change-Id: I50bbb43953a5128f358c6880032d20693531333b
(cherry picked from commit ed7ab6b505a2becf8f38edb3c43b96e51eac3317)

src/slic3r/pchheader.hpp

@@ -6,6 +6,11 @@
 		#define NOMINMAX
 	#endif
 	#include <Windows.h>
+	#include <CommCtrl.h>
+#endif
+
+#ifdef __APPLE__
+  #include <ApplicationServices/ApplicationServices.h>
 #endif
 
 #include <float.h>